Ukrainian President Petro Poroshenko has coordinated positions with Slovak President Andrej Kiska ahead of the informal EU summit in Bratislava in September.

Poroshenko thanked Kiska for his consistent support for the sovereignty and territorial integrity of Ukraine and briefed him about the latest developments on the administrative border with Crimea and in Donbas, the Ukrainian president's press service reported on Saturday.

"During the telephone conversation, the two officials noted the importance of continuing efforts, including in the framework of the Normandy format in order to have Russia observe the Minsk agreements, especially those related to security," Poroshenko's website reported.

The Ukrainian president noted the efficiency of the EU solidarity against Russian aggression and underlined the importance of keeping the EU sanctions in place until Moscow fulfills all its commitments under the Minsk agreements.

Poroshenko and Kiska also discussed topical issues on the agenda of bilateral relations and international cooperation.

The Ukrainian president said he hopes Slovakia, as the country presiding over the EU, will support Ukraine on its European integration path, in particular in the ratification of the Association Agreement with the EU, the introduction of the EU visa-free regime for Ukrainians and energy solidarity with Ukraine.

The two president o discussed cooperation between Ukraine and Slovakia within international organizations.